Heater housing



FIG. 1 is a top perspective view of a heater housing showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a side elevation view thereof; showing the side opposite from that shown in FIG. 4; and,

FIG. 6 is a rear elevation view thereof.

The bottom view (not shown) forms no part of the claimed design. The subject matter shown in broken lines is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a heater housing, as shown and described. 